<ul class="nav nav-tabs mb-3">
  
  <li class="nav-item">
    <a class="nav-link{% if active == 'quizzes' %} active{% endif %}" href="{% url 'home' %}">测验</a>
  </li>
  <li class="nav-item">
    <a class="nav-link{% if active == 'students' %} active{% endif %}" href="{% url 'students:student_list' %}">学生</a>
  </li>
  <li class="nav-item">
    <a class="nav-link{% if active == 'about' %} active{% endif %}" href="{% url 'about' %}">关于我们</a>
  </li>
</ul>



